<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8" />
<title>Hello React!</title>
<script src="https://unpkg.com/react@17/umd/react.development.js"></script>
<script src="https://unpkg.com/react-dom@17/umd/react-dom.development.js"></script>
<script src="https://unpkg.com/@babel/standalone/babel.min.js"></script>
</head>
<body>
 
<div id="root"></div>
<script type="text/babel">
ReactDOM.render(
    <h1>Hello, React!</h1>,
    document.getElementById('root')
);
</script>
 
</body>
</html>